Read Edit View history 单位切向量 dānwèiqiēxiàngliàng unit tangent vector Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 单位切向量/單位切向量 · dānwèiqiēxiàngliàng · unit tangent vector 2026/03/04 单位切向量 / 單位切向量 dānwèiqiēxiàngliàng unit tangent vector (math.) unit tangent vector 我们需要计算这条曲线在某一点处的单位切向量。 created sense Mar 4, 2026, 02:25 AM